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17h
answered New Idea to prove $1+2x+3x^2+\cdots=(1-x)^{-2}$
17h
answered New Idea to prove $1+2x+3x^2+\cdots=(1-x)^{-2}$
Jul
24
comment How to check this number $\sqrt{47}$ is irrational
Look at the proof that $\sqrt{2}$ is irrational and emulate it.
Jul
24
reviewed Edit How to check this number $\sqrt{47}$ is irrational
Jul
24
revised How to check this number $\sqrt{47}$ is irrational
edited LaTeX
Jul
24
comment What can I say about the constant of a Lipschitz condition for a scaled norm?
See Daniel's answer. Apparently you shouldn't use $\langle \cdot, \cdot \rangle_\theta$.
Jul
24
comment What can I say about the constant of a Lipschitz condition for a scaled norm?
You might be missing that $|\lambda(x)|_\theta^2 = \theta|\lambda(x)|^2$.
Jul
24
answered What can I say about the constant of a Lipschitz condition for a scaled norm?
Jul
24
comment Random increment through a probability distribution function
I'm not defining $x$. The equation is true for all $x$. For example, the probability that $\Delta X$ is at most $10$ is $F(10)$.
Jul
24
answered Countability of the set of weighted graphs
Jul
24
answered Indicator Functions with Random Variables
Jul
24
answered Random increment through a probability distribution function
Jul
19
comment Probability that multiple random walks are back at the origin
For $x = 2$ the answer is roughly $1/\pi n$, since in effect you have two completely independent random walks of length $n$. For larger $x$ the problem looks more difficult.
Jul
19
answered What happens when both nodes of a tree have the same weight while constructing a Huffman code?
Jul
17
revised How to combine the four Theorems in order to prove the statement?
rolled back to a previous revision
Jul
15
comment Statistical independence of degree in Erdos-Renyi random graph model
You can compute the covariance, for example, and you will find that it's pretty small.
Jul
15
answered Statistical independence of degree in Erdos-Renyi random graph model
Jul
14
answered Looking for a direct proof of the following exercise
Jul
13
answered Is There A Way To Calculate Expected value From Variance And Vice Versa?
Jul
13
awarded  Enlightened